Looks like I'm OK for the center channel install, but left and right is going to be a bit of a project... I've got 2 studs between each of the usual 16" spaced studs on both left and right install positions - picked up with one stud finder but not another. Because there is a fireplace involved in the equation I don't want to start hacking out wood just for the sake of installing speakers - the studs might actually be doing something...

Nice pictures, Scott! I like seeing a person with confidence document a project. I've yet to undertake my first drywall project. I've seen a lot of ugly drywall work...

Also, FYI. If you want to link directly to pictures or files in your dropbox -- and avoid having the dropbox branding tacked on in a header -- generate the public link as you normally would and then just add "?dl=1" to the end of it.